LINE-SHAPE OF MASS PEAKS IN A REFLECTRON WITH PLANE METAL GRIDS

The line shape of the TOF peaks in the reflectrons of various relative deceleration gap widths was calculated under conditions where the mai n limiting factor of reflectron mass resolution is ion scattering by t he reflectron grids. The analysis shows that the line shape of mass pe aks in a reflectron with highly transparent grids is generally far fro m Gaussian. In the cases where the mesh size of one of the grids is by some reason a few times larger than that of the other grid, two satel lites of minor amplitude were found to occur in the vicinity of the tr ue mass peak.